A vibratory screening machine having a single vibratory motor mounted on its inner resiliently mounted frame by motor mounting structures at its ends, each motor mounting structure consisting of a combination of a fist bracket carrying a directionally stiff bushing with the fist bracket being mounted in a motor mount bracket with the fist bracket having a first cutaway portion positioned within a second cutaway portion in a rib on the base of the motor mount bracket. The directional stiffness of each bushing is aligned with the center of rotation of the vibratory motor, and this will produce linear motion when the unbalance of the vibratory motor is in line with the center of rotation of the motor and the direction of the directional stiffness of the bushings.
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9. A vibratory screening machine comprising
an outer frame, an inner frame resiliently mounted on said outer frame, a single vibratory motor having a center of rotation and opposite ends, and a motor mount structure mounting each end of said vibratory motor on said inner frame, each motor mount structure comprising a directionally stiff bushing having a center, a motor mount bracket mounted between each end of said vibratory motor and each directionally stiff bushing, and said center of rotation and each center of each bushing being aligned with the direction of said directional stiffness of each bushing.
13. A vibratory screening machine comprising
an outer frame, an inner frame resiliently mounted on said outer frame, a single vibratory motor having a center of rotation and first and second opposite ends, first and second motor mount structures mounting said first and second opposite ends, respectively, on said inner frame, first and second directionally stiff resilient bushings in said first and second motor mount structures, respectively, and said center of rotation of said vibratory motor being substantially aligned with the direction of said directional stiffness of said first and second resilient bushings.
1. A vibratory screening machine comprising
an outer frame, an inner frame having first and second inner frame sides, resilient mounts mounting said inner frame on said outer frame, a single vibratory motor having first and second motor ends, first and second motor mounting structures mounting each of said first and second motor ends, respectively, on said first and second inner frame sides, respectively, said first and second motor mounting structures including first and second fist brackets, respectively, bolted to said first and second inner frame sides, respectively, first and second directionally stiff resilient bushings mounted within said first and second fist brackets, respectively, said first and second directionally stiff resilient bushings being inclined with their stiffness attitudes oriented in the conveyance direction of said inner frame, first and second motor mount brackets mounted on said first and second directionally stiff resilient bushings, respectively, and said first and second motor mount brackets mounting said first and second motor ends, respectively.
2. A vibratory screening machine as set forth in
said first and second fist brackets have fist bracket housings, a first cutaway portion on each of said first and second fist bracket housings, said first and second motor mount brackets having first and second motor mount bases, respectively, having inner and outer sides, a rib extending longitudinally on said inner sides of said first and second motor mount brackets, a second cutaway portion on said ribs, and said first cutaway portions on said first and second fist bracket housings being positioned within said second cutaway portions of said ribs of said first and second motor mount brackets, respectively.
3. A vibratory screening machine as set forth in
each of said fist brackets includes an attaching side which is bolted to said frame, a circumferential side which encompasses said directionally stiff resilient bushing, and wherein said first cutaway portion is a thinner portion of said circumferential side which is spaced from said attaching side and is of less thickness than portions of said circumferential side which are on opposite sides of said thinner portion.
4. A vibratory screening machine as set forth in
each of said motor mount brackets include motor mount bracket opposite sides which are located on opposite sides of each of said directionally stiff bushings and are bolted thereto.
5. A vibratory screening machine as set forth in
each of said fist brackets comprises a base, a housing on said base, a housing wall on said housing, and a thinner portion on said housing wall located between two thicker portions of said housing wall.
6. A vibratory screening machine as set forth in
each of said motor mount brackets comprises a base, an inner and outer side on said base, a pair of substantially parallel sides extending from said base, said inner side of said base being located within said substantially parallel sides, and a rib on said inner side.
7. A vibratory screening machine as set forth in
each of said motor mount brackets comprises a base, an inner and outer side on said base, a pair of substantially parallel sides extending from said base, said inner side of said base being located within said substantially parallel sides, and a plurality of ribs on said inner side.
8. A vibratory screening machine as set forth in
each of said fist brackets comprises a fist bracket, a fist bracket base on said fist bracket, a housing on said fist bracket base, and a housing wall on said housing: and wherein each of said directionally stiff resilient bushings comprise a bushing housing, a metal block having opposite ends extending outwardly from said bushing housing, and said directionally stiff resilient members being located between said bushing housing and said metal block; and wherein each of said motor mount brackets is secured to each of said metal blocks and comprises a motor mount bracket base on said motor mount bracket, inner and outer sides on said motor mount bracket base, and a pair of substantially parallel sides extending from said motor mount bracket base with each side bolted to one of said ends of said metal block.
10. A vibratory screening machine as set forth in
each directionally stiff bushing is mounted within a fist bracket which is mounted on said inner frame.
11. A vibratory screening machine as set forth in
each directionally stiff bushing has opposite ends, and wherein each motor mount bracket has opposite sides secured to said opposite ends of each bushing.
12. A vibratory screening machine as set forth in
each directionally stiff bushing is mounted within a fist bracket which is mounted on said inner frame.
14. A vibratory screening machine as set forth in
said first and second directionally stiff resilient bushings have second centers, and wherein said second centers are substantially aligned with said center of rotation of said vibratory motor and said directional stiffness of said first and second resilient bushings.
15. A vibratory screening machine as set forth in
said first and second directionally stiff resilient bushings are mounted in first and second fist brackets, respectively.
16. A vibratory screening machine as set forth in
said first and second directionally stiff resilient bushings have second centers, and wherein said second centers are substantially aligned with said center of rotation of said vibratory motor and said directional stiffness of said first and second resilient bushings.
17. A vibratory screening machine as set forth in
first and second motor mount brackets mounted on said first and second directionally stiff resilient bushings, respectively, and said first and second ends of said vibratory motor mounted on said first and second motor mount brackets, respectively.
18. A vibratory screening machine as set forth in
said first and second directionally stiff resilient bushings have second centers, and wherein said second centers are substantially aligned with said center rotation of said vibratory motor and said directional stiffness of said first and second resilient bushings.
19. A vibratory screening machine as set forth in
first and second motor mount brackets mounted on said first and second directionally stiff resilient bushings, respectively, and said first and second ends of said vibratory motor mounted on said first and second motor mount brackets, respectively.
20. A vibratory screening machine as set forth in
said first and second directionally stiff resilient bushings have second centers, and wherein said second centers are substantially aligned with said center of rotation of said vibratory motor and said directional stiffness of said first and second resilient bushings.
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Not Applicable
Not Applicable
The present invention relates to an improved vibratory screening machine which will produce linear motion with only a single vibratory motor which is mounted thereon by unique mounting structure and to components of the unique motor mounting structure.
By way of background, in vibratory screening machines two vibratory motors are utilized in tandem to produce desired linear motion for effecting the vibratory screening operation. As is well known in the art, the two motors are rigidly secured to the resiliently mounted inner frame of the vibratory screening machine. These two motors are operated in opposite directions to thereby produce linear motion for conveying the material which is being screened. Insofar as known, a single motor mounted on a vibratory screening machine always produced orbital motion and was incapable of producing linear motion.
It is accordingly one object of the present invention to provide an improved vibratory screening machine utilizing only a single vibratory motor which is capable of producing linear motion of the screen-carrying inner frame of the machine.
Another object of the present invention is to provide a combined fist bracket and motor mounting bracket structure for mounting a single vibratory motor to provide linear motion.
A further object of the present invention is to provide an improved fist bracket structure for use in a vibratory screening machine mounting a single motor to produce linear motion.
Still another object of the present invention is to provide an improved motor mount bracket for use in a vibratory screening machine mounting a single motor to produce linear motion. Other objects and attendant advantages of the present invention will be readily perceived hereafter.
The present invention relates to a vibratory screening machine comprising an outer frame, an inner frame resiliently mounted on said outer frame, a single vibratory motor having a center of rotation and first and second opposite ends, first and second motor mount structures mounting said first and second opposite ends, respectively, on said inner frame, first and second directionally stiff resilient bushings in said first and second motor mount structures, respectively, and said center of rotation of said vibratory motor being substantially aligned with the direction of said directional stiffness of said first and second resilient bushings.
The present invention also relates to a vibratory screening machine comprising an outer frame, an inner frame having first and second inner frame sides, resilient mounts mounting said inner frame on said outer frame, a single vibratory motor having first and second motor ends, and first and second motor mounting assemblies mounting each of said first and second motor ends, respectively, on said first and second inner frame sides, respectively, said first and second motor mounting assemblies including first and second fist brackets, respectively, bolted to said first and second inner frame sides, respectively, first and second directionally stiff resilient bushings mounted within said first and second fist brackets, respectively, said first and second directionally stiff resilient bushings being inclined with their stiffness attitudes oriented in the conveyance direction of said inner frame, first and second motor mount brackets mounted on said first and second directionally stiff resilient bushings, respectively, and said first and second motor mount brackets mounting said first and second motor ends, respectively.
The present invention also relates to a motor mount bracket and fist bracket combination comprising a fist bracket, a fist bracket base on said fist bracket, a housing on said fist bracket base, a housing wall on said housing, a thinner portion on said housing wall adjacent to a thicker portion of said housing wall, a bushing in said housing wall, a bushing housing on said bushing, a metal block having opposite ends extending outwardly from said housing, resilient members between said bushing housing and said metal block; and a motor mount bracket secured to said fist bracket, a motor mount bracket base on said motor mount bracket, inner and outer sides on said motor mount bracket base, and a pair of substantially parallel sides extending from said motor mount bracket base with each side bolted to one of said ends of said metal block.
The present invention also relates to a fist bracket comprising a base, a housing on said base, a housing wall on said housing, and a thinner portion on said housing wall located between two thicker portions of said housing wall.
The present invention also relates to a motor mount bracket comprising a base, an inner and outer side on said base, a pair of substantially parallel sides extending from said base, said inner side of said base being located within said sides, and a plurality of ribs on said inner side.
The various aspects of the present invention will be more fully understood when the following portions of the specification are read in conjunction with the accompanying drawings wherein:
The improved vibratory screening machine 10 of the present invention includes an outer stationary frame 11 mounting an inner movable frame 12 by means of a plurality of resilient mounts 13 extending between a plurality of sites between the inner and outer frames, as is well known in the art. Relative to each resilient mount 13 (FIG. 2A), two bolts 14 extend through bores, not numbered, in side plate 15 of the outer frame and thread into a metal plate 17 which is bonded to one side of the resilient cylindrical member 16, and two bolts 19 extend through bores in an associated side plate 20 of movable frame 12 and are received in threaded bores of plate 21 bonded to resilient cylindrical member 16. The foregoing structure is conventional in the art. As can be seen from
In accordance with the present invention, a single motor 22 is mounted on rails 23 of inner frame 12 by unique mounting structure to provide the desired linear vibratory motion thereto. In the foregoing respect, a fist bracket 24 (
A bushing 30 (
Bushing 30 includes an elongated metal block 40 of substantially square cross section within opening 41 of bushing housing 31. It is held in position by two compressed resilient members 42 and two compressed resilient members 42', as shown in FIG. 12. Resilient members 42 and 42' are identical and of uniform cross section throughout their lengths and they extend the entire length of bushing housing 31. The ends 43 of metal block 40 extend outwardly beyond the bushing housing 30 (FIG. 13). Tapped bores 44 extend into opposite sides of metal block 40. Bushing 30 is a commercially obtainable device. Bushing 30 is directionally stiff in the direction of arrow 46 which is the direction of the desired conveyance of the material on the screen of machine 10, and when vibratory motor 22 is in operation, this feature produces linear motion. In the present instance the arrow 46 extends at an angle of 45°C to the screen bed of the machine 10. However, this angle may vary with different machines.
After the bushing 30 has been clamped in position within fist bracket 24, a motor mount bracket 45 (
In accordance with the present invention, the foregoing mounting of the single vibratory motor produces linear motion. In this respect, the center of rotation C (
In addition to the foregoing geometry which produces the desired linear motion, each fist bracket 24 and motor mount bracket 45 is configured so as to cause center of rotation C of motor 22 to be as close as possible to the center X of bushing 30. The minimizing of this distance tends to decrease a pendulum effect created by the vibration of the motor relative to the center X of bushing 30 to thereby cause a greater amount of its thrust to be directed in the desired direction of conveyance of the material being screened, which gives rise to greater G forces applied to the inner frame than if the center of motor 22 was further away from the center X of bushing 30. In this respect, as can be seen from
In addition to the foregoing, the motor mount brackets 45 are preferably fabricated of cast aluminum to thereby cause them to weigh less than if they were made out of conventional cast iron or steel. The above described rib structure of motor mount brackets 45, when in cast aluminum, increases their strength so that they can withstand the loads to which they are subjected. Additionally, considering that the weight of motor mount brackets 45, when in aluminum, is less than their weight in either steel or cast iron, this also reduces the pendulum affect. Preferably the fist brackets are fabricated of cast iron.
In the above portions of the specification reference was made to the unbalance of a vibratory motor. This is usually achieved by mounting an eccentric weight on the rotor, but it can be achieved in other ways.
While preferred embodiments of the present invention have been disclosed, it will be appreciated that it is not limited thereto but may be otherwise embodied within the scope of the following claims.
Colgrove, James R., Lipa, Anthony J.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Mar 31 1993 | Derrick Manufacturing Corporation | Derrick Corporation | CHANGE OF NAME SEE DOCUMENT FOR DETAILS | 018471 | /0654 | |
Mar 22 2002 | Derrick Corporation | (assignment on the face of the patent) | / | |||
Mar 22 2002 | COLGROVE, JAMES R | Derrick Manufacturing Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 012734 | /0152 | |
Mar 22 2002 | LIPA, ANTHONY J | Derrick Manufacturing Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 012734 | /0152 |
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